Mounting for loop aerials



Feb. 12, 1929.

1,701,666 R. M. DIENER MOUNTING FOR LOOP AERIALS Filed Dec. 1924 2 Sheets-Sheet 1 Feb. 12, 1929.

1,701,666 R. M. DIENER MOUNTING FOR LOOP AERIALS Filed Dec. 8, 1924 2 Sheets-Sheet 2 tT LAxTIE x aw I wfimm Patented Feb. 12, 1929.

UNITED STATES PATENT OFFICE.

RILEY M. DIENER, OF ELKHART, INDIANA, ASSIGNOR, BY MESNE ASSIGNMENTS. TO CHICAGO TELEPHONE SUPPLY COMPANY, OF ELKHART, INDIANA, A CORPORATION OF DELAWARE.

MOUNTING FOR LOOP AERIALS.

Application filed December 8, 1924. Serial No. 754,475.

This invention relates to antenna for radio reception and more particularly to an improved mounting for loop aerials and the like.

The directiomil characteristics of a loop antenna or aerial are well known in the art. These characteristics make it desirable to provide antcuuozs of this sortwith a menu i which will permit turning 01 the am iii... ti the desired position with respect to the station from which it is desired to receive, to take advantage of said cliarinitoristics, in tuningthe receiving circuit to the waves radiating from the sending station.

Good contact and a connection between the aerial and receiving or other circuit in which the functioning of the contacts and sociated leads will not he impaired. by turning of the aerial into different positions also highly desirable.

According to my invention I provide a genorally improved, simplified and inexpensive aerial mounting which will permit turning the aerial as desired with ease and couven ience and which will, at the same time, providecircuit connections from the aerial to the receiving circuit, which will not be impaired by the adjustability provided nor by the turning of the aerial but will maintain a proper connection and good contact at all times.

To maize the structure simple and inweponsii c 'ufpossil'ilc, consistent with good opcratioin l have arranged to use a inimum number of standard parts. I talqe what amounts to a 'rcgi ular or standard jar 1nd :1. roopcratii'w' plug; and by givinn t e vehilively stat nil-y support and mo no; the aerial. ca post or frame on *no plug! so i rotatable therewith. convcnk a n? the aerial is permitted and at the same time good connection and contct is provided at all times to the jack circuit.

The twisting and st-res, in; of slaclzed c n- 'ons between fixed terminals and the taps of a rotatably mounted aerial are eliminated... The mounting is firm and sturdy and the relatively stationary jack contact is, as already pointed out, what amounts to a jack so that the panel and plate borings and mountings for this and the jacks employed may be standardized. I also provide for preventing the showing ot any tilting of the antenna and novel cord t1p. sleeves or ack terminal means adapted to be inserted or passed through a minimum sized opening in the panel mounting base or plate.

To acquaint those skilled in the art with the structure and manner t practicing my invention. 1 shall now describe a particular einhodimcnt of the same in couniction with the accompanying drawings, in which Fig 1 is a front elevational view of a loop aerial mounted according to my invention;

F 2 is a detail clevational view of the mounting Fig. 3 a vertical section taken on line 83 of Fig. 2;

Fig. at is an elevational view of a moditication looking in a direction at right angles to the direction at which Fig. 2 is viewed;

Fig. 5 is a tragnnentary etail section vcrtically through the axis of the relatively stationary jack contact mounting of Fig. 4:. shi'iwing the plug in elevation; and

Fig. 6 is an end view of the jack from he low showing the terminal or cord tip sleeves of the jack.

Referring first to Figures 1 and 2, dcs1i hates a panel or plate which may he the mounting or flush plate 7 is attached hy screws 8 to the top of the panel 5 over the opening 6 and has an opening 5) concentric with the opening 6. A sleeve or thimhle 10 l ving ahead 11 overlying the plate 7 passes down through the opening 9, and below tlic plate 7 threads into the thirnble leg or lateral car 12 of a jack frame or bracket 13. A collar 14, surrounding he thinlble 10 and interposed between the plate 7 and car '12, spaces the car 12 from the plate 7 to properly position the hump 15 ot' the tip contact spring for proper co-operation with the hill and valley in the plug tip 17 when the plug is insorted into the jack.

The, jack frame has a base 18 and the contact spri 16 is mounted with a ground con tact spring 19 upon said base, the spring contacts 16 and 19 being insulated from each other by strips 20 of fibre or other suitable insulating material interposed therebetween. Screws 21, passing through apertures in the contact springs 16 and 19 and strips of insulation 20 and threaded into the base 18, firmly secure the contact springs and strips of insulation to said base, said screws 21 being surrounded by insulating bushings 22 which insulate them from the contact springs. The contact spring 16 is, as already pointed out,

the tip spring for contact with the plug tip and the spring contact 19 is the ground contact and it contacts directly with the frame 13 and is connected through said frame with the thiinble or sleeve 10.

The lower ends o1 each of the springs 16 and 19 has a longitudinally extending portion or depending ear 23. Gontactsle ves 24 an slotted diagonally at one end to lit over the ears or longitudinally extending portions 23 and one sleeve 24 is lit over each ear and soldered in place thereon. It should be noted that the sleeves 24 are mounted upon opposite sides of the respective spring contacts, the sleeve mounted upon the contact spring 16 being shown oilset laterally to the right in Fig. 2, and the other sleeve oliset laterally to the left. This staggers the sleeves with respect to each other and in eilect disposes them diagonally across the lower ends of the contact springs and insulating strips mounted on the base 18, making the terminal sockets 24 compact and permitting insertion of them and the entire ack through an opening 6 of minimum diameter.

The slots for receiving the ears 23 extend diagonally through the generally circular ends of the sleeves 24 and spaced from said ends each sleeve 24 has a generally rectangular fiat surface 25, milled or otherwise formed therein. The sleeves 24 have eccentric sockets tor receiving the conductors 26 for con- Looting the ack in circuit with the receiving Screws 2?, threaded laterally into the socketed ends of the sleeves 2 through the flat surfaces 25, are adapted for clamping the r I-lldllCiIOl'S in the sockets oi? the sleeves 24.

The flat surfaces are by this disposition,

disposed diagonally across the lower end of the generally rectangular jack spring and insulating strip unit as shown in Fig. 6 and the screws 27 are disposed diagonally at right angles to said surfaces for convenient access and without appreciable projection from the sides of said unit when extended. This lends itself to the desired compactness for insertion through an opening 6 of minimum size.

The plug comprises an upper body member 30 and a lower body member 31 underlying said first body member and both being of brass, or other suitable conducting material, and insulated from-each other by 'afibre or other suitable insulating washer 32.

The contact post of the plug comprises a sleeve contact 33 passing through and secured in the sleeve body 31 in contact therewith and a needle 34 extending concentrically through the sleeve 33 and. insulated therefrom by an intervening sleeve 35 of fibre or other suitable insulation. The tip 1'? is threaded upon and in contact with the lower end of the needle 34 and is insulated from the sleeve 33 by insulating washer The tip 17 at the lower end of the needle 34 may be touched with solder to secure it firmly in place. The upper end of the needle 33 is threaded into the needle body 30 in Contact therewith and binds the parts firmly together. The upper end of the needle may be headed or riveted over, or toucheo with solder if desired.

'Yhc upper part oi the body member 31 is reduced to substantially the diameter of the b. dy member 30, forming a radial flange at its lower end and fitting over the body member 30, and the reouced upper part of the body member 31 with its lower open end adapted for engagementwith this radial flange, is a sleeve 33, which may be formed of fibretubor other suitable insulating material. 1, 2 up er end oi? the sleeve 33 has an insulating washer 39 suitably secured therein and this head an anialopening for receiving the lower end of the upright aerial carrying 20s 40. which is adapted to extend down L concentrically through the sleeve 38 and to seat at its lower end in a socket 42 in the upper surface of t- 1e body member 30. The post may have a pressed lit in the head 39 or it may be squared or of non-circular "formation for cooperation with a similarly formed opening in head 39 or similarly formed socket in body member 30, or the antenna post and plug may be otherwise connected for rotation together,

A pair of screws pass laterally through the sleeve 38 and by threaning one of said sore vs into each ot the body members 30 and 31, they perform the dual function of securing the sleeve in place upon said body mem bers, and providing plug terminals to which the l3 or taps from the aerial loop 48 are adapted I have shown "or connection.

each lead or tap 46 as provided with a terminal 4%), and tobind said terminals 49 firmly and in any d sired position upon the screws without adjusting said screws and inde pendent oi? the heads thereof, I thread upon each screw a pair of binding nuts 52which may be independently adjusted along the screws 45 and drawn up to bind the terminals 49 between them, and when so drawn up, form lock nuts, one for the other.

In assembling, the mounting )lLiLQ 7 and jack frame are secured together in spaced relation by the thimble 10 and the entire jack with the contacts on its base18 is inserted through the opening 6 in the mounting board or panel 5 and the plate 7 is attached to the top of said. board or panel. VJhen the plug is inserted, the hexagonal upper end of thimble 10 forms a seat for the lower flanged end at body 31 and by providing a clearance between the mounting plate and said body, keeps any tilting of the plug or aerial from showing.

in use, the plug when inserted in the ack is rotatably mounted therein, and the spring contact lo, Lu tip 17, permits tarning of the aerial d8 as desired for directional purposes and maintains good contact at all between the aeri and jaclr circuits. The connecting of the aerial leads or taps to the terminals 45, and the leading oi? one or both of the connectionc' down through the rotatable aerial rating post, permits turning of the aerial is eesired Without the necessity of slacking id Without the possibility of twist- .itreuing or Winding said leads about post of the aerial.

In Fig. i I show an additional spring arm 60 mounted with the spring arm 16 and stri; s 20 upon the base 18 of the jacl; frame. When the plug post or tip is inserted, this additional spring 60, which need serve no current carrying function, has a hump 62 at its upper end which co-o aoratcs with the tip 17 of the l ectrically o1 posite the hump 15,

log a balanced s ring arfor holding the plu tip fir nly in plac and in good contact Witl the contact spring Without any tilting or oojectionable inclination oi the plug.

In Figs. i and 5 I have also shown the thin'ible or sleeve as rigidly lined in the mounting plate its upper end being riveted or headed over at 65, flush with the upper surface of the plate 7, said sleeve 10 being externally threaded, as before, for threaded engagement With tapped opening in the lateral leg or car 12 of the jack an-e, a suitable spacing collar 14% being irtcrnosed between the ear l2 and the plate 7 to position the contact springs of the jack for pro era-operation with the plug tip.

ll'l we intercha .l icing; colrcsirablc, the spacin shoulder be termed into al with the We 10. In this case, upon 121- Y J I pn g, the lower hanged end I member 31 co-operatcs directly oi co-operation than Where a one of the tlnmble 1s interposed Ween, and because of said larger area ration, a. firmer seating and this With nations 0 he pl'iq ess likely.

i do not intend to belnmte'd to the precise by Wiping contactu uh the p m an described. The loading of t io i. i leads down the rotatably mounted pcsl is a important aspect of the invention, and in this connection it is to be pointed out i2 r g of one lead only down .l is or course contemplated Within tire scope 0. my invention. A minimum d parts are employed and nd convenience or turnnig of the loop with good contact at all times, is secured.

claim:

1. combination, an aerial ha ing leads there rein, a pair or body memd from each other, a plug post comprising a s-ilceve contact connected in contact with one d body members, a necdlc co nassi through and insulated from i sleeve contact and threaded into the other body member, a sleeve of insulation mounted upon said body members, and adapted to receive an aerial post, and a pair rews passing laterally through said and threaded one into each of said body lllCll'lb-QIS, saie screws forming terminals for the aerial leads.

2. in combination, an aerial having leads e in, aaair of body memd from each other, a plug post sleeve contact connected in conntaet passing through and insulated i i said sleeve contact and threaded into the other body member, a sleeve of insulation mounted upon said body members and adapted to receive an aerial post, a pair of screws passing laterally through said sleeve and threaded one into each of said body mcmbe us, said screws forming terminals for the eerie. leads and a jack for receiving the plug, ial being connected in circuit With through said needle and sleeve c0ne Pron RILEY N. DIENER. 

